.travis.yml in ruby-graphviz-1.2.3 vs .travis.yml in ruby-graphviz-1.2.4

@@ -11,10 +11,11 @@
 #
 # Note: travis-ci uses precise by default
 dist: trusty
 
 rvm:
-  - 2.0.0
-  - 2.1.2
-  - 2.4.0
+  - 2.2.10
+  - 2.4.5
+  - 2.5.3
   - jruby
+  - rubinius-3.107
   - rubinius-3.69